CD214B-T5.0ALF Equivalent & Substitute Parts

Part Overview

The CD214B-T5.0ALF is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Bourns Inc., designed for general-purpose overvoltage protection in surface mount applications. This component features a 5V reverse standoff voltage with a 9.2V maximum clamping voltage and 65.2A peak pulse current capability in the DO-214AA (SMB) package. The part is currently obsolete, making equivalent and substitute components necessary for new designs and ongoing production support.

Key Parameters

Parameter	Value
Manufacturer Part Number	CD214B-T5.0ALF
Manufacturer	Bourns Inc.
Product Status	Obsolete
Type	Zener
Unidirectional Channels	1
Voltage - Reverse Standoff (Typ)	5V
Voltage - Breakdown (Min)	6.4V
Voltage - Clamping (Max) @ Ipp	9.2V
Current - Peak Pulse (10/1000µs)	65.2A
Power - Peak Pulse	600W
Operating Temperature	-55°C ~ 150°C (TJ)
Package / Case	DO-214AA, SMB
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the CD214B-T5.0ALF is determined by strict electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Requirements:

Voltage - Reverse Standoff (Typ): 5V
Voltage - Breakdown (Min): 6.4V
Voltage - Clamping (Max) @ Ipp: 9.2V
Unidirectional Channels: 1
Type: Zener

Mechanical Compatibility Requirements:

Package / Case: DO-214AA, SMB
Mounting Type: Surface Mount

Compliance Requirements:

RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Substitute parts are grouped into three categories based on their relationship to the original specification:

Direct Substitutes maintain identical electrical parameters and peak pulse current ratings (65.2A–65.3A), ensuring drop-in replacement capability with no circuit redesign required.

Upgrade Substitutes provide identical voltage and clamping characteristics but may feature enhanced specifications such as extended temperature ranges or improved availability from active manufacturers.

Similar Substitutes maintain core voltage parameters and package compatibility but may differ in peak pulse current (44A–108.7A) or power dissipation (500W–1000W), requiring circuit-level verification before implementation.

Parameter Comparison

Parameter	CD214B-T5.0ALF (Main)	SMBJ5.0A (EVVO)	SMBJ5.0A-HR (Littelfuse)	SACB5.0 (Littelfuse)	SMB10J5.0A-M3/52 (Vishay)	SMB10J5.0A-M3/5B (Vishay)	SMBJ5.0A-TP (MCC)	SMBJ5.0A-TR (STMicroelectronics)	SMBJ5V0A (Fairchild)
Voltage - Reverse Standoff (Typ)	5V	5V	5V	5V	5V	5V	5V	5V	5V
Voltage - Breakdown (Min)	6.4V	6.4V	6.4V	7.6V	6.4V	6.4V	6.4V	6.4V	6.4V
Voltage - Clamping (Max) @ Ipp	9.2V	9.2V	9.2V	10V	9.2V	9.2V	9.2V	9.2V	9.2V
Current - Peak Pulse (10/1000µs)	65.2A	65.3A	65.3A	44A	108.7A	108.7A	65.2A	68A	65.2A
Power - Peak Pulse	600W	600W	600W	500W	1000W	1000W	600W	600W	600W
Operating Temperature	-55°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 175°C	-55°C ~ 150°C	-55°C ~ 150°C
Package / Case	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct Substitutes (Recommended for Drop-In Replacement):

SMBJ5.0A from EVVO Semi and SMBJ5.0A-HR from Littelfuse are direct functional equivalents to the CD214B-T5.0ALF. Both maintain identical voltage parameters (5V standoff, 6.4V breakdown, 9.2V clamping) and equivalent peak pulse current ratings (65.3A). SMBJ5.0A-HR from Littelfuse offers extended temperature range (-65°C to 150°C) compared to the original specification. Both parts are ROHS3 compliant with MSL 1 rating and are currently in active production with substantial inventory availability.

Upgrade Substitutes (Enhanced Specifications):

SMBJ5.0A-TP from Micro Commercial Co provides identical electrical performance to the original part with an extended operating temperature range of -55°C to 175°C, offering improved thermal margin for high-temperature applications. This part maintains 65.2A peak pulse current and 600W power dissipation.

Similar Substitutes (Conditional Use):

SMB10J5.0A-M3/52 and SMB10J5.0A-M3/5B from Vishay General Semiconductor maintain voltage compatibility but feature enhanced peak pulse current (108.7A) and power dissipation (1000W). These parts are suitable for applications requiring higher transient energy absorption. SACB5.0 from Littelfuse maintains voltage standoff and package compatibility but features reduced peak pulse current (44A) and power dissipation (500W), suitable only for lower-energy transient environments.

All substitute parts listed are ROHS3 compliant with MSL 1 moisture sensitivity rating, ensuring compatibility with standard manufacturing and storage requirements.

Frequently Asked Questions (FAQ)

Q: Can SMBJ5.0A from EVVO Semi be used as a direct replacement for CD214B-T5.0ALF?

A: Yes. SMBJ5.0A maintains identical voltage parameters (5V standoff, 6.4V breakdown, 9.2V clamping), equivalent peak pulse current (65.3A vs. 65.2A), and identical package (DO-214AA, SMB). No circuit modification is required.

Q: What is the difference between SMBJ5.0A-HR from Littelfuse and the standard SMBJ5.0A?

A: SMBJ5.0A-HR is designated as an upgrade substitute with identical electrical performance but extended operating temperature range (-65°C to 150°C vs. -55°C to 150°C). The "-HR" designation indicates enhanced reliability specifications. Both are electrically interchangeable.

Q: Why does SACB5.0 have different voltage clamping (10V vs. 9.2V)?

A: SACB5.0 is classified as a similar substitute rather than a direct equivalent. While it maintains the 5V reverse standoff voltage and DO-214AA package, the 10V clamping voltage represents a different protection threshold. This part is suitable only for applications where the higher clamping voltage is acceptable.

Q: Can SMB10J5.0A-M3/52 from Vishay be used in place of CD214B-T5.0ALF?

A: SMB10J5.0A-M3/52 maintains voltage compatibility but features significantly higher peak pulse current (108.7A vs. 65.2A) and power dissipation (1000W vs. 600W). This part is suitable for higher-energy transient protection but requires circuit-level verification to ensure the application can tolerate the enhanced specifications.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed are ROHS3 compliant with MSL 1 moisture sensitivity rating, meeting standard environmental and manufacturing requirements.

Q: What is the significance of the DO-214AA package designation?

A: DO-214AA is the industry standard package designation for SMB (Surface Mount Body) TVS diodes. All parts listed use this package, ensuring mechanical and thermal compatibility with existing PCB layouts and assembly processes.

Q: Which substitute offers the widest operating temperature range?

A: SMBJ5.0A-TP from Micro Commercial Co offers the widest operating temperature range (-55°C to 175°C), providing 25°C additional high-temperature margin compared to the original CD214B-T5.0ALF specification.

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